---
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"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/18055#article
headline: "18055: Invalid email"
url: https://www.twilio.com/docs/api/errors/18055
inLanguage: en
dateModified: 2026-06-09T11:00:42.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 18055: Invalid email

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when the `Email` value on a Regulatory Bundle is not a valid email address. Twilio requires this field when you create a Bundle and uses it to send status updates when the Bundle changes status.

### Possible causes

* The `Email` value does not follow standard email address syntax.
* The address is missing the `@` symbol or a valid domain.
* The address contains unsupported characters, starts with a period, or includes repeated periods.
* The local part, domain part, or full address exceeds standard email length limits.
* The email entered in the Bundle's Notifications section does not match a valid email format.

### Possible solutions

* Update the `Email` value to a valid address such as `name@example.com`.
* Verify that the address includes one `@` symbol, a complete domain, and only supported characters.
* Remove leading periods, repeated periods, and extra whitespace from the address.
* If you create Bundles through the API, validate the `email` field before you submit the request.
* Resubmit the Bundle after you correct the email address.

#### Additional resources

* [Bundles Resource](/docs/phone-numbers/regulatory/api/bundles)
* [Getting Started: Regulatory Compliance Public REST APIs](/docs/phone-numbers/regulatory/getting-started/create-new-bundle-public-rest-apis)
* [Understanding Regulatory Bundle Rejections](https://help.twilio.com/articles/16066152436507-Understanding-Regulatory-Bundle-Rejections)